Dispersions of halogen-2-butadiene 1,3 and the process of making same



Patented May 18, 1 937 I UNITED,

DISPERSIONS OF 1,3 AND "THE PROCESS. OF MAKING ,SAME

Wallace, Home Carothers, Wilmington, Del., as

signor to E.

I. du Pont de Nen'rours 8r Company,

'Wilmlngton. DeL, a corporation of Delaware No- Drawing. hpplicaition August @1934,

Serlalliio. 738,931 {26 Claims. (01. 260-6.),

This inventlon' relates, the, preparationfoi' new dispersions of halogen-Z-butadienes-lfir More particularly it relates. to the Pr p ration of stable dispersions of ;halogen-2-butadiene- 1,3 5 in a medium which isnon-aqueous or chiefly.

non-aqueous. Still more particularlyit relates to the preparation of non-aqueous, or chiefly nonaqueous, dispersions of chloro-2-butadiene-1,;3

431. The making ofaqueous dispersions of halo-. gen-2-butadiene-1,3 polymer. is described in acopending application l 01' Collins,- Serial No. 537,484, filed May-14, 1931. Acidaqueous dispersionsof these substances have been described. by Kirby in a copending application, Serial, No.- 572,'7 39,'filed November 2,1931. r

1,3 in a medium which is non-aqueous, or chiefly non-aqueous." Another object is to polymerize ha1ogen-2-butadiene-1,3 in a medium which is ther object-is the preparation "of dispersions oi; chloro-2-but'adi'ene-L3 polymer in Other objects will appear hereinafter. A v

, It has now been found that the halogen-j2-butadienes-'1;3 may be readily emulsified in certain non-aqueous media, using various emulsifying agents. The emulsion may contain suflicient water to assist in the solution of the emulsifying 35 The following examples are intended to be construed as illustrativeonly and not as limiting" the scope 'of the invention. Example 1 I v 200 parts of chloro-2'-butadiene--1,3 are'emulslfled by high speed stirring or other violent'agitation in a solution of 2} parts 'of sodium oleate in 10% water solution and 160 partsofglycerine. Polymerization of the dispersed-monomeris al lowed to take place undercareiultemperattire control, therate being aboutthe same as tor aqueous dispersions. I r

Example 2] [1 200 parts oi chloro 2- butadiene 1,3- are emulsi fled in'a solution of 4 parts oisodium oleatein'200 Polymerization is allowed to parts of glycerin. take placeas in'the "other example. The usual stabilizing agents may be added.

55 By way of illustration to the products of Exampolymers and .bromo-2-butadlene-1,3.1polymers. w The preparation of the 'halogen-2-butadieness 1,3 which are used in the, process of the-present invention is" describedin U. 8. Patent No.- 1-,950,-.-

thatthe inventionis not to be sollmited. The

chloro-2-butadiene-L3 may be replaced by any It is an objectof the present invention to. pree; 1: pare stable dispersions of halogen.-2-butadiene- ,glyceroL.

which"comprise all of the v ples land 2 above, 3 parts of 29% ammonium hydroxide and 5 parts of a 50% dispersion of ethyl or phenyl-beta-naphthylamlne may be added.

The.chloro 2-butadiene 1,3 polymer may be coagulated from these latices by acids or by 5 alcohol or separated by filtration through'porous porcelain.z .The organic. liquid may be removed i'rom the coagulum by washing on therolls' oi a rubber washing mill with water or with alcohol. 10 Although only chloro. -2-butadiene.-1,3 has been 1 used inthe abovepexamples it will be understood of the halogenQ-butadlenes-lfi.

non-aqueous liquid may be used in which the,

halogen-2-butadiene-L3 is insoluble and which does not prevent the polymerization of the halogen-z-butadieneelfi. It is to be understood that media which merely retard the polymerization but donot prevent it are to be included within the scope of this invention. Examples of other Y 1 materials which, under certain circumstances, non-aqueous, or chiefly non-aqueous. A still furmay be used in place of the glycerin in the above examples are: ethylene glycol and formamide.

In place 'ofthe sodium oleate in the above exampleaany of the well known emulsifying agents may be used; such as, for example, alkali metal salts of alkyl naphthalene, sulfonic improved emulsifying agents recentlydescribed,

alkali metal salts ofthe sulfuric acid esters of the-normal straight.-

. chain primary aliphatic alcohols-containing more acids oifxthe than. 8 carbon atoms. In certain cases it-may be necessary, or desirable, toadd just suflicient water to the' dispersion to dissolve the emulsifying agent, as illustrated in Example '1, above.

The amount of' emulsifying agent to be used is susceptible t'o'rather wide variation. Amounts 40 ranging from 1% to 3%, based on the halogen-2- butadiene-1-,3; have given goodresults; .Greater amounts may be used but" they are tordinarily unnecessary. 2% on thev same basis. :is the amount usually employed. a 1

The: dispersed halogen-2-butadiene'-'1,3 polymerizes Just'as it-doesin aqueous dispersions and. heat,'pressure and the presenceof'catalysts, inf

' hibitors, alkalies, oxygen and oxidizing agents have eifeetsslmilar to those on. aqueous dispersions. The particle size ln'theseemulsions of halogen-2*butadiene-L3 isof the same order of mag-nitudeas' that of the aqueous adispersions.

7 *Stable dispersions containing as hlghas of halogen-butadiene polymer may be obtained in 5 1,3 dispersed in glycerin.

glycerin, for example. The dispersions containing from 40% to 50% oi polymer have, however. been iound to be most satisfactory.

As indicated above the dispersions oi poLymer may be coagulated in the usual manner to yield a polymer similar to that producedby polymerising in the presence oi water. Any material which may be dispersed in the same non-aqueous liquid asthe halogen-2-butadiene-L3 to give dispersed particles bearing a negative charge may be added to the latices oi this invention. Thus by the processoi this invention a may be obtained.

It is apparent that many widely diiierent embodiments of this invention may be made without I departing from the spirit and scop thereof. thereiore, this invention is not to be limited except as indicated in the appended claims.

I claim:

1. A dispersion comprising halogen-i-butadlene-l,3 dispersed in an organic liquid which is a non-solvent for the'halogen-2-hutadiene-L3 and is not capable of preventing the polymeriaa tion of the halogen-2-butadiene-l.3.

2. A dispersion comprising chloro-3-butadiene- 1,3 dispersed in a liquid oi the group consisting oi glycerin, ethylene soluble and which liquid does not prevent the polymerization oi the chloro-il-butadlene-1,3.

3. A dispersion comprising apolymer oi halogen-2-butadiene-L3' dispersed in an organic liquid which is a non-solvent ior the halogen-2- butadiene-l,3 and is not capable oi preventing the polymerization oi the halogen-2 1,3

2-butadiene-i,8 dispersed in an organic liquid which is a non-solvent ior the chloro-i-butadiene-1,3 and is not capable oi preventing the polymerization oi the chlorO-2-butadiene-13.

5. A dispersion comprising chloro-2 butadiene- 8. A dispersion comprising chloro-Q-butaflene- 1,3 polymer dispersed in glycerin.

'1. The product described in claim licharacterized in that it contains sodium oleate as an emulsliying agent.

8. The product described in claim 6 charactcrized in that it contains sodium oleate as an emulsiiying agent.

9-. A process which comprises iorming a dispersion oi a halogen-ii-butadiene-iii man organic liquid as the continuous phase, which organic liquid is a non-solvent for the halogen-3- butadiene-l,3 and is not capahleoi preventing the polmerization of the halogen-fl-butadiene-lfi.

10. A process which comprises dispersing chloro-2-butadiene-1,3 in a liquid oi the group consisting of glycerin, ethylene glycol, and ionsamide is insoluble and which liquid does not prevent the polymerization dime-1,3.

11. A process which comprises iorrning a dis persion of a halogen-2-butadiene-l3 in an 0!- .ganic liquid as the continuous phase, which organic liquid is a non-solvent (or the halogen-3- butadiene-1,3 and is not capable of preventing the polymerization oi halogen-2- butadiene-l,3.

12. A process which comprises iorniing a dispersion'oi chloro-2-butadiene-1,3 in an organic liquid as the continuous phase, which organic liduid is a non-solvent for the chloro-Q-hutadiene- 1,3 and is not capable oi preventing the 90 7M- butadiene-LS.

, tadiene-1,3 polymer wide variety oi latices glycol, and iormamide is in-- 4 A dispersion comprising a polymer of chloru- Y of the chlON-R-bilthbutadiesie-lj and then polymerizing the dispersed halogen-3- iaation oi the chloro-fl-butadiene-ifi and then polymerizing the dispersed chlomdqbutadlene- 1,3.

13. The process that an emulsiiying liquid prior to the oi claim 11 characterised in agentbasbesnaddedtothe s dispersion'oithehalogen-s- 14. A dispersion comprising ehloro-a-budispersed in a liqui 0! the glycerin and ethylene glycol and iormasnlde.

16. A process which comprises dispersing chloro-fl-butadienedj in glycerin in the presence oi an em agent and then polymerising the dispers d chlcro-fl-butadiene-m.

comprise groupconsistingoi 16. The process which dispersing ohloro-2-hutadiene-i,8 in aiiquid oi the group consisting oi glycerin. eth! glyc l and imamide and then M the dispersed chloro-fl-butadiene-Ls. so

h eolnnfl fl dispersing irom 40 to %,"based'm the-ws'ht oithe result-v s p rsion, oi chm-21,8 idpresemonwsmmmm trol. 1e.'rhe process which iromsiltom ,basedmth widthsgo dispersion oi g-bntadiIs -u in aid oiglycerineon oleate. in 10% water utisn. than emulsiiyin agent present.

2am melamine: eharaeterisedinthatiteontaimanunuisiisins agent.

st'l'heprocessoielainiisinrther andanarnount CERTIFICATE OF CORRECTION.

Patent No. 2,080,558. May 18, 1957.

WALLACE HUME CAROTHERS.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 2, first column, lines 2'7, 28 and 29, and lines 60, ,617 and 62, claims 2 and '10 respectively, strike out the words is insoluble and which liquid does not prevent the polymerization of the ohIQro-Z-butadiene-l, 3"; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 21st day of September, A. D. 1957.

Henry Van Arsdale (Seal) Acting,Commi ssioner of Patents. 

